@Donald: i'll let you know! :-). Still no delivery .. :-( @Randys: thank you!! 100-300 IS or 75-300 IS? Never heard of an 100-300 lens with IS but i may very well be wrong with that!! I'd bet you're happy with that 100-400 L IS lens g .. if anyone is willing to buy exclusive rights on some of my pics .. loool I'd like to see that galery, of course. If you'd post the URL here? Do you have similar shots with both lenses to compare them? Thx in advance! As you did mention Sigma: my dealer here was saying, that Sigma has some technical problems (e.g. metal-screws within plastic counterparts which does look like high-value but is way inferior to just glueing) and he's getting back a lot of that lenses. Also, there are (he said) problems with just re-engineering canon-techniques (instead of licensing them) which can lead to compatibility-issues later. Don't know if he's right with that as i'm quite happy with my Sigma-Macro lens .. but of course, what can i say after 3 weeks ... ;-)